At the very least, Sunday's match could put millions of Catholics - not to mention Vatican employees - in a bit of a bind.

Will they root for Argentina, the homeland of Pope Francis, who is known to be an ardent soccer aficionado? Or will they back Germany, the native country of Pope Emeritus Benedict XVI, also a football fan?

And what about the Big Referee Upstairs? Whose prayers will he heed when the game is on the line?

Of course, both Popes (not to mention God) have more important things on their minds. But the pontiffs have also said that sports can be more than fun and games.

"The sport of football can be a vehicle of education for the values of honesty, solidarity and fraternity, especially for the younger generation," Benedict told Italy's Gazzetta dello Sport newspaper back in 2008.

But a Catholic who met Pope Francis this week to discuss more serious matters said that the pontiff seemed to be secretly pulling for his home team.

"He absolutely wants for Argentina to win," Peter Saunders, a victim of sexual abuse from England who met Francis on Monday, told the Boston Globe. "He didn’t say it out loud, but you could see it in his eyes, he’s a closet fan."

And earlier this month, before Argentina played Switzerland, Francis jokingly told his Swiss Guards, "It's going to be war!"

It will be interesting to see what the Vatican says about the Argentina-Germany matchup. The men are known to be close, with Francis saying he and Benedict "are brothers."

Maybe the "brothers" will put a little wager on the high-stakes soccer match, or maybe this just means that God has a really good sense of humor.

On Thursday, Vatican spokesman Rev. Federico Lombardi dashed hopes for a World Cup papal watch party, but left often the possibility that something could be afoot.

The CNN Belief Blog covers the faith angles of the day's biggest stories, from breaking news to politics to entertainment, fostering a global conversation about the role of religion and belief in readers' lives. It's edited by CNN's Daniel Burke with contributions from Eric Marrapodi and CNN's worldwide news gathering team.